Objective is to jump and run with a small white block, getting as high as possible.
Run with the arrow left and right keys, jump with arrow up. To get higher you have to jump on the blocks that fall from the sky. If you cannot reach the top of a block by jumping, you can try climb-jumping it by jumping when you are close to one of its side walls.
Beware of the rising liquid. If it reaches you, you loose!